Ground Flow boots are another striking breathable design from Forma. They have CE certified protection complete with limited-crush sole, shift pad reinforcing, heel reinforcing, and internal plastic ankle TPU. The Ground Flow boots are lightweight and super comfortable.12 months Warranty \ CE® level protection \ Textile + Leather upper \ Urban sole \ Ankle Malleolus TPU \ Reinforced heel \ Velcro® + Safety Lace closure \ Anti-shock EVA mid-sole \ Technical insole \ European designed \ Standard Fit WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov This warning is being provided to comply with the State of California's Proposition 65.